CDM probe not receiving Network File System (NFS/CIFS) utilization alerts on Linux

Products

• DX Unified Infrastructure Management (Nimsoft / UIM)

Issue/Introduction

Users may report that they are not receiving disk utilization alerts for network-mounted file systems (NFS or CIFS) on Linux servers, even when:

• Disk utilization thresholds (Major/Critical) are correctly set.
• The utilization exceeds these thresholds on both the OS and UIM side.
• No pre-processing rules or maintenance suppressions are active.
• The probe is successfully sending test alarms for local disks.

The cdm.log (at level 5) may show entries similar to: cdm: Skipping Network fs /mount/point - nfs space checking not active

Environment

Environment

• Operating System: Linux (RedHat, SuSE, etc.)
• Probe Version: cdm 6.60 and higher

Cause

By default, the cdm probe is configured to skip network-mounted file systems to prevent probe hangs if a remote mount becomes unresponsive. Additionally, CIFS mounts may require specific Device ID handling to be recognized correctly as network drives after a probe restart.

Resolution

To enable monitoring and alerting for network file systems, you must modify the probe configuration using Raw Configure:

1. Enable NFS/Network Space Checking:

   • Open Raw Configure for the cdm probe.
   • Navigate to the /disk/fixed_default section.
   • Locate the key nfs_space_check.
   • Set the value to yes.
   • Click Apply or OK to save the configuration.
   • The probe will restart automatically. 

   • Verification:

     • Run the disk_history callback in the probe utility to verify that data for the mount point is now being collected.